I agree - Marketing is the way to go, unless you are a real history/literature buff already. I cringe at the idea of math questions on timed tests. I have a real love/hate relationship with Math - I like it, but I am defintely challenged by it when testing!
Can you calculate a percentage increase/decrease? That is all the math you really need for this exam.
I used the resource below to remind me how to do it (I just so could not ask my 13 year old to remind me how to do it!): Algebra maybe, but percentages!! No!! A parent has to keep some dignity!
http://media.wiley.com/product_data/...0470007192.pdf
I found the InstantCert flashcards worked well for me and the REA book "Intro to Marketing" gave me the big picture I needed in less than 2 hours. The REA tests were good practice for the math questions (altho' they were not nearly as hard or nearly as many on the actual exam!) Out of all the exams I have done, this one took me the least amount of time to study for and was the easiest of any on your list.